previous：前一个Webflow拥有这个对象；当那前一个Webflow被从栈中删除时，它将被删除。

Previous: the previous Webflow owns the object; it is removed when that previous Webflow is removed from the stack.

youdao

第20行访问栈顶(栈顶的索引为- 1)作为lua字符串，打印消息，然后从堆栈中删除该值。

Line 20 accesses the top of the stack (the top of the stack has an index of -1) as a Lua string, prints the message, and then removes the value from the stack.

youdao

栈和后备存储内存写入到转储文件应过滤，删除所有的指针值，但要重建一个堆栈跟踪。

Stack and backing store memory written to the minidump file should be filtered to remove all but the pointer values necessary to reconstruct a stack trace.

youdao